Improvement in joints for cement-pipes



ltbtted (Statut aient Qtjjirr.

MELVIN STEPHENS, OF BROOKLYN, NEW YORK, ASSIGNOR TO HIM-Y SELF AND NATHAN STEPHENS, OF SAME PLACE.

Letters Patent No'. 94,146, dated August 24, 1869.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, MELYIN STEPHENS, of Brooklyn, in theconnty of Kings, and State of New York,

.have invented and made a certain new and useful Iniprovement in Joints for Cement-Pipes; and I do hereby declare the following to be a full, clear, and exact 4description of the said invention, referencebeing had to the annexed drawing, making part of this specification, wherein- Figure lis a section longitudinally of a pipe and joint;

Figure 2 is a plan of the ring and keys for tightening the same;

--Figure 3 represents the ring and opening for introducing cement;

Figure 4 is a section of part of a joint; and Figure 5 represents the joint as partially made.

Similar marks of reference denote the same parts.

Cement-pipes have heretofore been made, in which a. sheet-iron tube is lined with cement, and the joints between these pipes hare been made by setting the ends of the sections closely together, and then pressing cement around the joint, and sometimes a metal ring has been used to surround the cement.

This mode of construction is objectionable, because the cement does not unite the iat surfaces of the cement lining that come together, and the water sometimes works out between the joint, and along the iron surface between thatand the cement collar, and in many instances the cement lining contracts away from the iron casing, andwater works in at the 'ends of the pipes, and escapes at the laps in theiron' casing.

My invention obviates the beforementioned diiicnlties, makes a very strong and perfect joint, saves cement, facilitates construction, and lessens the expense.

In the drawinga and b represent portions of ce1nent`pi-pes, formed in any usual manner, c c being the sheet-iron casing of said pipes.

Instead of bringing the ends of the pipes as close together as convenient, I make use o i the ring ,'t-hat is formed of sheet-metal, and convex on its outer surface, so that the edges of the ring can slip into the ends lof the sections of pipe, but the convexity of the exterior of the ring prevents the parts heilig pressed together beyond acertain point. i

This ring d may be iilled with cement, so that the inner surface of the pipe at the joint may be smooth, or nearly so, and this ring facilitates the laying of pipe when one length is not on the saine, line as the other.

The workman iills the space between the pipes with cement.

It is best to moisten the ends of the pipe in the first instance, and the cement is to Vbe pressed into the joint by the` workmc ns hand, or tool applied to wipe the cement around the joint, and thereby unite the cement lining itself, and prevent leakage.

In order to form an exterior' protection to the joint, I usea` second ring, e, made of sheet-metal, and'concave on the inside, in order that the edges of the ring may set closely to the exterior of the pipe, and a space be left, between the ring and pipe, for cement, as at Thigh-ing e may be madeto t the exterior of the pipe, and he slipped over the joint, as prepared in the manner before described, and then the space f filled,- 'by pouring or pressing the cement in through a hole,

as seen at g, fig. 3, or the vring e may be .made to open, as seen in iig. 2,' in which case the workmanA wipes around the joint, leaving snficient cement prol jecting to fill the space f, and tlien the sections of rings are applied, or the rings sprung open and passed over the cement, and drawn closely around the same, to consolidate it, and hold the cement tightly upon the joint.

. h h are tongues or loops applied to the ends of the ring c, through which the key or keys t are inserted, to firmly hold the band to its place. i

In repairing cement-pipes, it frequently happens that one pipe cannot be pressed up against the next ;A

hence an internal ring, in the form shown in iig. 1,- couldnot be employed.

I, therefore, `proyide a sheet-metall ring, Z, fig. 4, of a size to fit the interior of the pipe, and with a bead or flange on one edge, so as to prevent its slipping into the pipe, and insert the same as in fig. 4, and introdnce the section'of pipe or stop-cock into the' required place. v

I then slip the ring L out, until it reaches the end of the other pipe, or until the'ilanges or ribs and beads of the two (if two 'are used) interlock, as in fig. 5.

The flanges or beads facilitate themovving of the ring by a tool introduced at the joint.

rihe joint is 'rendered water-tight, by cement applied around said ring l, and between the ends of the pipes, 'or awind'mg of twine and white lead, or other material, may be introduced, to form the vfilling of the joint.

. By my improvement the cement of the lining is durably united, hence there cannot be any leakage, as has heretofore sometimes been the case, by water passing between the cement at the ends of the pipe, thence between the sheet-iron and the cement, and thence escaping where the sheet-iron is lapped and riveted.

' This joint is much stronger .than those before made, and the earth, in filling the trench, does not injure the cement around the joint.

What I claim, and desire4 to secure by Letters Patent, is'- l. A ring, applied within and between the ends `of I consolidate the cement and hold the ends of the cement or other pipes, to sustain the cement or other pipes, as set forth.

material introduced to make a joint between-such In witness whereof, I have hereunto set my sigpipes, substantially as set forth. nature, this 5th day o f Merch, A. D. 1869. 2. The ringsl and z, constructed and applied in the MELVIN STEPHENS. manner and for the purpose specified.

3. .The concave ring e,f1tted so as to be opened, lvitnesses: and provided with means for drawing the ends to- CHAs. H. SMITH, gether and securing the same, so as to confine and GEO. T. PINGKNEY. 

